The State Grid Corporation of China will build a separate corporate pavilion in the World Expo Shanghai site, the Expo organizers announced today.

State Grid, which became the eighth global partner of Shanghai Expo on December 17, is the fourth one that has confirmed to join the company pavilion exhibition.

The company, listed as the 29th place in Fortune 500 companies, said they will showcase how electricity influenced the evolution of human beings in their exhibition.

State Grid, the world's biggest public utility company, will provide electricity and related services to the event.

China Mobile, a joint of Shanghai Automotive Industry Corporation Group and General Motors and Vanke, China's biggest listed real estate developer, are the other three that confirmed to build corporate pavilions.

Global partners have the priority to build corporate pavilions, the organizers said.

Shanghai Expo will set up an area of 110,000 square meters to hold 16 corporate pavilions, including nine Chinese enterprises.

Among the 16 corporate pavilions, 14 will be newly-built and two will be renovated from old factories.

Also today, three 110-kilovolt electric substations have started construction in the Expo Village, the accommodation area of the workers in the southern Expo site.

The structures of the three substations will stay underground to maintain fine scenery in the village. The ground part will be covered with greenery.

The three stations, which are expected to complete in 2009, will provide safe, clean and high-quality electricity to the Expo site.

The whole energy project for the Expo site includes five 110-kilovolt substations, two 220-kilovolt ones and two 500-kilovolt ones.

One of the two 500-kilovolt substations is in city's Jing'an District, only 1,000 meters away from the People's Square.